package com.lzy.crm.base.util;

import java.security.MessageDigest;

import org.springframework.util.DigestUtils;

public class Md5Util {

	public static String encode(String password) {
		if (null == password ){
			return password;
		}
		return DigestUtils.md5DigestAsHex(password.getBytes());
	}
	
	 public static String getMD5(String content) {
	        MessageDigest messageDigest = null;
	        try {
	            messageDigest = MessageDigest.getInstance("MD5");
	            messageDigest.reset();
	            messageDigest.update(content.getBytes("UTF-8"));
	        } catch (Exception e) {
	        	e.printStackTrace();
	        } 

	        byte[] byteArray = messageDigest.digest();

	        StringBuffer md5StrBuff = new StringBuffer();

	        for (int i = 0; i < byteArray.length; i++) {
	            if (Integer.toHexString(0xFF & byteArray[i]).length() == 1)
	                md5StrBuff.append("0").append(Integer.toHexString(0xFF & byteArray[i]));
	            else
	                md5StrBuff.append(Integer.toHexString(0xFF & byteArray[i]));
	        }

	        return md5StrBuff.toString();
	  }
	 
	 public static String MD5Encode(String origin, String charsetname) {
			String resultString = null;
			try {
				resultString = new String(origin);
				MessageDigest md = MessageDigest.getInstance("MD5");
				if (charsetname == null || "".equals(charsetname))
					resultString = byteArrayToHexString(md.digest(resultString
							.getBytes()));
				else
					resultString = byteArrayToHexString(md.digest(resultString
							.getBytes(charsetname)));
			} catch (Exception exception) {
			}
			return resultString;
		}
	
	 
	 private static String byteArrayToHexString(byte b[]) {
			StringBuffer resultSb = new StringBuffer();
			for (int i = 0; i < b.length; i++)
				resultSb.append(byteToHexString(b[i]));

			return resultSb.toString();
		}

		private static String byteToHexString(byte b) {
			int n = b;
			if (n < 0)
				n += 256;
			int d1 = n / 16;
			int d2 = n % 16;
			return hexDigits[d1] + hexDigits[d2];
		}
		

		private static final String hexDigits[] = { "0", "1", "2", "3", "4", "5",
			"6", "7", "8", "9", "a", "b", "c", "d", "e", "f" };
}